Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-05-18
2009-11-24
Feggins, K. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S046000
Reexamination Certificate
active
07621624
ABSTRACT:
A highly-efficient ultrasonic wave ink-jet head includes a piezoelectric transducer and a Fresnel lens provided on a supporting layer. A chamber structure is fabricated on the supporting layer by lithography etching, and further bonded with an ink-storing groove to form an ink-jet head. The design provides a total reflection of ultrasonic waves generated on the opposite side of the piezoelectric transducer through the deviation of acoustic impedance of ultrasonic waves at different media. The sound energy of the ultrasonic wave can be effectively reused. Moreover, the phase of the reflected ultrasonic wave is consistent with that of the direct ultrasonic wave generated by the piezoelectric transducer. This forms a highly-efficient ultrasonic wave ink-jet head.
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Chang Lung-Ch
Hsiao Jung-En
Pan Min-Chun
Feggins K.
National Central University
Shih Chun-Ming
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